JPH02252999A - Fan for air conditioner - Google Patents

Abstract

PURPOSE:To increase air blasting efficiency by providing a boss with first blades, which extend toward the outside in the radial direction at a prescribed interval around the axis of the boss, and also providing the boss with second blades, which are comparatively small and located between the first blades. CONSTITUTION:A fan 40 as an outdoor unit for an air conditioner is used to blast the air on the outdoor-heat-exchanger-side to the side of a blow-off port, which is formed onto an outdoor unit casing. The fan 40 is driven by a motor. Such a fan 40 is consisted of a nearly cylindrical boss 41 made of synthetic resin and first and second blades 42 and 43, both of which are also made of synthetic resin. The first blades 42 are formed so as to extend in the radial direction of the boss 41 at an angle-difference of 90 deg. with each other. Meanwhile, each second blade 43 is installed between the first blades 42 and formed in such a way that its span l less than a half of the span L of the first blade 42.

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Application Field) The present invention relates to a fan for an air conditioner, and particularly to a fan for sending outside air for heat exchange to an outdoor heat exchanger that is small and can improve air blowing efficiency. Regarding fans for air conditioners.

(Prior art) For example, when operating an indoor unit of an air conditioner for cooling, it is necessary to cool the outdoor heat exchanger installed in the outdoor In order to Plate C, which has the same shape and size as the boss portion to be connected, extends radially outward at a predetermined distance from each other.

(Problem to be Solved by the Invention) By the way, the problem with such air conditioner fans has originally been to improve their air blowing efficiency, but the conventional air conditioner fans a have not been able to meet the demands of recent years. There was a problem in that there were cases where sufficient air blowing efficiency could not be obtained to satisfy the requirements.

The above-mentioned problem will now be considered as follows.

That is, in the conventional air conditioner fan a, the surface is wide at the tip of the plate C where the angular velocity is maximum during rotation, and the angle is optimally suppressed. The aim is to obtain a large air flow rate, that is, a large air volume. Therefore, in the conventional air conditioner fan a, most of the total air volume generated by the fan a is obtained from the tip of the plate C, and the air volume obtained from the base end cannot be expected. Therefore, it is considered that the conventional fan structure has poor air blowing efficiency.

Moreover, in order to solve the above-mentioned problem, it is possible to increase the surface area of the plates C so as to fill the gaps between the plates C, but it is not possible to increase the air volume without increasing the diameter of the fan a. It is extremely difficult.

The present invention has been devised in view of the above problems and to effectively solve them.

An object of the present invention is to provide a fan for an air conditioner that is small in size and can improve air blowing efficiency.

[Structure of the invention] (Means for solving the problem) The present invention provides a fan for an air conditioner provided in an outdoor unit for cooling an outdoor heat exchanger. , a first plate extending radially outward by a predetermined length is provided at a predetermined interval around the axis, and a second plate smaller than the first plate is provided between these first plates. be.

(Function) In addition to the air volume obtained by the first plate at its tip, the second plate also provides air volume at the base end of the first plate, so the air volume can be obtained without increasing the diameter of the fan. can be increased.

(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 3 and 4 show an outdoor unit 1 provided with an air equalizer fan according to the present invention. The outdoor unit 1 constitutes an air conditioner together with an indoor unit (not shown), and is used to compress refrigerant to high temperature and high pressure when the indoor unit is operated for cooling. Therefore, the outdoor unit 1 mainly includes a gauging 10, an outdoor heat exchanger 20, a compressor 30, a fan 40, and an electric motor 50. That is, an outdoor heat exchanger 20 and a compressor 30 are housed in the casing 10, and the refrigerant sent from the above-mentioned indoor unit is compressed to high pressure via the compressor 30 and then compressed to the outdoor heat exchanger 20. The water is allowed to pass through, and the air is returned to the indoor unit. On the other hand, the side plate 11 adjacent to the outdoor heat exchanger 20 of the gauging 10 and the side plate 1 opposite to the side plate 11
2 is formed with a substantially circular suction port 13 and a substantially circular air outlet 14 for sucking and blowing outside air into the casing 10, respectively. Between the outdoor heat exchanger 20 and the air outlet 14 in the casing 10, an outdoor heat exchanger 2011 is provided.
1+! A fan 40 for sending l of air to the outlet 14 side
An electric motor 50 for driving the fan 40 is provided. Here, the fan 40 is fixed to a rotary drive shaft 51 of an electric motor 50, and rotates together with the rotary drive shaft 51 when the electric motor 50 is driven to generate an air flow flowing through the casing 10 in the direction A in FIG. ing. Therefore,
When the fan 40 is rotated, the heat of the outdoor heat exchanger 20 is removed by the aforementioned air flow, and the outdoor heat exchanger 20 is cooled.

Note that 60 is a partition plate that partitions the compressor 30 in order to make the air flow as desired, and 70 is an air outlet 1 for preventing damage to the fan 40 and injury to the operator.
This is a wire guard installed at 4.

A characteristic feature of the present invention is that the fan 40 has two different shapes.
By providing the seed plate, the air flow rate, that is, the air volume can be increased without increasing the diameter of the fan 40.

As shown in FIGS. 1 and 2, the fan 40 is composed of a boss portion 41 made of a synthetic resin material, and a first plate 42 and a second plate 43 also made of a synthetic resin material. That is, the boss portion 41 is formed in a substantially cylindrical shape and is connected to the rotational drive shaft 51 in a reciprocal manner.

On the other hand, the base end portions of the first plates 42 are attached to the outer peripheral surface around the axis of the boss portion 41 so as to extend in the radial direction of the boss portion 41 with an angular difference of 90 degrees from each other.

Further, the base end portion of the second plate 43 is attached between the first plates 42 so as to extend in the radial direction of the boss portion 41 with an angular difference of 90 degrees from each other.

Here, the second plate 43 is provided to increase the air volume of the fan 40. Therefore, as shown in FIG. 1, the span of the second plate 43 is set to be one-half or less of the span L of the first plate 42, and the tip of the second plate 43 has a time difference between the tip and the tip of the first plate 42. The width dimension is such that a predetermined air volume can be obtained near the base end of the first plate 42, that is, at the upper and lower edges of the base end of the first plate 42 in FIG. There is.

Next, the operation of this embodiment will be explained. Now, in the outdoor unit 1 described above, the electric motor 40 is driven and the fan 40 is
When the is rotated in the direction B in FIG.
The air flows along the surface of the plate 42 , the air flow is generated near the outer periphery of the fan 40 , and the air (outside air) after the heat exchange is blown out of the casing 10 from the outlet 14 . At the same time, the air after heat exchange also flows along the surface of the second plate 43 and is blown out from the outlet 14 as an airflow near the center of the fan 40 . Then, the outdoor heat exchanger 2o is cooled by the air volume of the first plate 42 and the air volume of the second plate 43.

Therefore, according to this embodiment, the air volume near the center or shaft of the fan 40 increases due to the action of the second plate 43, so the air volume relative to the rotational speed increases without increasing the diameter of the fan 40. The air volume relative to the number increases, the air blowing efficiency of the fan 40 can be improved, and the cooling capacity of the outdoor heat exchanger 20 can be increased. Further, when the same air volume as the conventional one is sufficient, the rotational speed of the electric FI 50 can be lowered, thereby reducing power consumption and economic burden.

5 and 6 show another embodiment of the air conditioner fan according to the present invention. This fan 80 is
The second plate 83 is attached to the boss 81 in a state where it overlaps with the first plate 82, and the same effects as in the previous embodiment can be achieved.

In the above embodiment, the span of the second plate 43.83 was formed to be less than half of the span of the first plate 42.82, but it may be more than that. It goes without saying that the shape of the second plate 43.83 is not limited to that shown in the embodiments, and can be selected from various shapes.

[Effects of the Invention] As is clear from the above description, the present invention provides the following excellent effects.

By providing the second plate between the first plates, it is possible to increase the air volume near the center or axis of the air conditioner fan, and to obtain a compact air conditioner fan with high air blowing efficiency.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of an air conditioner fan according to the present invention, FIG. 2 is a side view of essential parts showing an embodiment of an air conditioner fan, and FIG. 3 is an air conditioner fan. A perspective view showing an outdoor unit using a fan, Figure 4 is IV-I of Figure 3.
5 is a front view showing another embodiment of the air conditioner fan according to the present invention; FIG. 6 is a side view of essential parts showing another embodiment of the air conditioner fan; FIG. 7 is a front view of a conventional air conditioner fan. In the figure, 1 is an outdoor unit, 20 is an outdoor heat exchanger, 40 is a fan, 41 is a boss portion, 42 is a first plate, and 43 is a second plate. Patent Applicant Toshiba Corporation Patent Attorney Nobuo Kinutani Figure J Figure Figure

Claims (1)

[Claims] 1. In an air conditioner fan installed in an outdoor unit to cool an outdoor heat exchanger, a boss connected to a rotational drive shaft is provided with a fan installed radially outward at a predetermined interval around the axis. A fan for an air conditioner, characterized in that a first plate extending a predetermined length is provided, and a second plate smaller than the first plate is provided between these first plates.